<textarea id="reservation_backoffice_logs" 
          class="reservation_internal_comments" 
          name="reservation_backoffice[comments_internal]" cols="30" rows="4">
<?php foreach ($logs as $log): ?>
<?php echo date('d-m-Y', strtotime($log['created_at'])) ?> - <?php echo $log['message'] ?>

<?php endforeach ?>
</textarea>